The question is given as
[tex](7\sqrt[]{x}-4)(\sqrt[]{x}-7)[/tex]This simply can be expanded to be
[tex]7\sqrt[]{x}(\sqrt[]{x}-7)-4(\sqrt[]{x}-7)[/tex]Expanding the parentheses, we have
[tex]7\sqrt[]{x^2}-49\sqrt[]{x}-4\sqrt[]{x}+28[/tex]Simplifying the roots, we have
[tex]7x-49\sqrt[]{x}-4\sqrt[]{x}+28[/tex]Simplifying further, we have the final answer as:
[tex]7x-53\sqrt[]{x}+28[/tex]
